Thin Layers

From: Rob Connelly (Becton Dickinson  & Company)
To: RP-ML
Date: Friday, January 20, 1995
Subject: Thin Layers
RP types,
     To start a new thread, I'd like to ask the group a couple of SLA related questions. 
     (1) What is the thinnest layer thickness that you can RELIABLY build in your SLA (-1, -250, -500) using epoxy resin?
     (2) What tricks do you pull to accomplish this thinness?
     On our end, Beth and I used to build a lot of very-small-cross-section parts at 3 
mils with SL-5170 in our SLA-250.  Doing so seems to be extremely dependent on a 
PRECISE calibration of the recoater arm; to a degree that we find to lack 
repeatability.  As such we have put three mil layers on the unreliable list.  Now 
we build small sections at 4 mils, and large sections at 5 mils.
     Any thoughts?
- Rob